As said before: every method (guest post, pbn link, niche edit,...) can work. It dependes on how you execute the method.
Let's take guest posts as an example: you have to put work in the inquiry. If there are spelling mistakes or if your mail is to generic, you won't get a single answear. You have to do this quite individualized. Ask yourself: how can you add value to the site you are asking to publish a guestpost on? Propose this idea in your inquiry.
Let's take guest posts as an example: you have to put work in the inquiry. If there are spelling mistakes or if your mail is to generic, you won't get a single answear. You have to do this quite individualized. Ask yourself: how can you add value to the site you are asking to publish a guestpost on? Propose this idea in your inquiry.